With an objective lens diameter of 50mm, these binoculars provide excellent light transmission for dawn-to-dusk viewing. Aspherical lenses, an ergonomic chassis and quick central focus maximize long-term viewing comfort. High-resolution aspherical lens system is engineered to provide an extremely clear, distortion-free image over the entire field of view. Constructed with an all-metal chassis and lens fittings housed in a tough, lightweight polycarbonate body. Ergonomically shaped body is tripod-adaptable and rubber-coated for an easy grip and stylish carry. Diopter control allows easy compensation for common left eye/right eye vision imbalance. Multi-coated, anti-reflective lens coatings are engineered to deliver optimum brightness, high contrast, true color rendition and flare-free viewing. Utilizes BaK4 high index prisms for clear, round images free from vignetting.